| ITEM | STANDARD |
| Appearance | White to cream colored powder |
| Purity (dry basis, %) | >= 98 |
| Viscosity (2%, 25℃, mPa.s ) | 800 - 1200 |
| Degree of substitution | >= 0.6 |
| pH (1% solution) | 6.0- 8.5 |
| Loss on drying (%) | =< 10 |
| Sulphated ash (%) | 23 - 27 |
| Iron | =< 0.02% |
| Lead | =< 5 mg/kg |
| Arsenic | =< 3 mg/kg |
| Mercury | =< 1 mg/kg |
| Cadmium | =< 1 mg/kg |
| Total heavy metals (as Pb) | =< 15 mg/kg |
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